Petfinders.com is doing a centralized database for missing and displaced animals and for those in need of foster care.
http://disaster.petfinder.com/emergency/
If you can foster care please do these animals need help.
Also on a brighter note, a article about a man and his wife who put together Operation Petlift using his own money. Very heartwarming article
http://www.cnn.com/2005/US/09/11/katrina.dog.flight.ap/index.html
Lisa